Regents
After a severe regency, military failure in Egypt, and mutiny in the army, Perdiccas was assassinated by his senior officers in May or June 321 or 320 BC (problems with Diodorus's chronology have made the year uncertain), after which Antipater was named as the new regent at the Partition of Triparadisus. He brought with him Roxana and the two kings to Macedon and gave up the pretence of ruling Alexander's Empire, leaving former provinces in Egypt and Asia in control of the satraps (see diadochi). When Antipater died in 319 BC he left Polyperchon, a Macedonian general who had served under Philip II and Alexander the Great, as his successor, passing over his own son, Cassander.
Read more about this topic: Alexander IV Of Macedon